Installation method of a herringbone gear ring

Abstract

The present invention discloses a method for installing a herringbone gear ring. During the installation process of the upper gear ring, the lower gear ring and the fixing sleeve, the weight of the upper gear ring, the lower gear ring and the fixing sleeve is always supported by a support tooling, so as to avoid the weight of the gear ring and the fixing sleeve concentrating on the meshing teeth of the planetary gear and the herringbone gear ring during the installation process; after the upper gear ring is installed on the planetary gear set, the relative position between the upper gear ring and the lower gear ring can be quickly adjusted by adjusting the jacking tooling and the positioning marks, so that the planetary gear, the upper gear ring and the lower gear ring ensure the best meshing state, ensure the stability and safety of the planetary gear assembly and the gear ring during subsequent operation, and improve the assembly efficiency and success rate.

Description

Technical Field

[0001] The invention relates to the field of nuclear power reducers, and in particular to a method for installing a herringbone gear ring. Background Art

[0002] In the herringbone planetary gear system, the gear ring used for transmission is composed of two and a half herringbone gear rings. The two need to be installed separately during assembly, and the heights of the upper and lower gear rings need to be adjusted after installation so that the outer teeth of the upper and lower gear rings are aligned before the external fixing sleeve can be installed. The original assembly method is to support the lower gear ring with equal height blocks of a certain height, and adjust the outer teeth alignment by lowering the gear ring up and down by a crane. The adjustment method is cumbersome and insensitive, and requires multiple adjustments. In addition, during the overall assembly, the height of the fixing sleeve also needs to be adjusted during installation of the lower retaining spring between the fixing sleeve and the fixing ring. The original plan is to use a pry bar to adjust the height of the fixing sleeve, which is cumbersome, time-consuming and labor-intensive, and easy to damage parts.

[0003] The patent document with the publication number CN104141745A discloses a star-shaped herringbone gear reducer, comprising a planet carrier, a fixed ring, and a star-shaped gear pair consisting of a sun gear, a planet gear, and an inner gear ring, characterized in that: the gear teeth of the sun gear, the planet gear, and the inner gear ring in the star-shaped gear pair are all herringbone teeth, and the sun gear has an involute spline, and the sun gear is fixedly connected to the input shaft through a spline, and the fixed ring is assembled with the inner gear ring to achieve torque output; the planet gear is composed of a herringbone gear, a web, a first gasket and a fixed plate, the web is located in the inner cavity of the herringbone gear, the inner side of the herringbone gear has splines in the circumferential direction, and the outer side of the web has splines evenly distributed in the circumferential direction, the herringbone gear and the web are connected by splines, and a gap is left between the splines and filled with elastic material, the first gasket and the fixed plate are located at both ends of the web, and are fixedly connected to the web by a first stud, and the web is connected to the planetary gear shaft by a flat key; the two ends of the planetary gear shaft are interference fit with the cylindrical roller bearing fixed on the planet carrier; the planet carrier is composed of a planet carrier base and The planet carrier top plate is composed of a planet carrier base and a planet carrier top plate, and a plurality of circular holes are evenly distributed along the circumferential direction according to the axis. The circular holes of the planet carrier base and the planet carrier top plate are provided with bosses. The planetary gear shaft and the cylindrical roller bearing are matched and located in the circular holes. The planet carrier base and the planet carrier top plate are fixedly connected by bolts. The inner gear ring includes an upper gear ring and a lower gear ring. One end of the upper gear ring and the lower gear ring retreat groove is respectively provided with a trapezoidal boss and a trapezoidal groove. The upper gear ring and the lower gear ring are matched with the trapezoidal boss and the trapezoidal groove to realize circumferential and lateral positioning. A plurality of first arc-shaped grooves and a second arc-shaped groove are evenly distributed along the circumferential direction on the other end of the gear ring and the lower gear ring; the fixed ring comprises an upper fixed ring and a lower fixed ring, and a plurality of first arc-shaped bosses and a second arc-shaped bosses are evenly distributed along the circumferential direction in the upper fixed ring and the lower fixed ring respectively, and are fixedly matched with the first arc-shaped grooves and the second arc-shaped grooves of the upper gear ring and the lower gear ring, and a third internal spline is provided at the bottom output end of the lower fixed ring to connect with the output shaft, and the connecting flanges at one end of the upper fixed ring and the lower fixed ring are respectively provided with mounting holes and are fixedly connected by bolts.

[0004] In the prior art, the upper gear ring and the lower gear ring are connected by means of a boss, a groove and bolts. In this way, a relatively high machining accuracy is required for the gear ring during machining. At the same time, a relatively high fitting accuracy is required for the upper gear ring and the lower gear ring when the gear ring and the planetary gear set are installed. During the installation and the transfer of the speed reducer, the weight of the gear ring is completely borne by the herringbone teeth. Moreover, if the heights of the various points of the gear ring are different, resulting in different radial clearances between the gear ring and the planetary gears, it is easy to cause transmission pulsation and reduce the service life of the speed reducer. Summary of the Invention

[0005] In order to solve the problem in the prior art of how to avoid different radial clearances between the gear ring and the planetary gears, the purpose of the present invention is to provide an installation method for a herringbone tooth gear ring. By installing a plurality of jacking tools capable of adjusting the extending length on the planet carrier to support the gear ring and the fixing sleeve, the heights of various points of the gear ring and the fixing sleeve are adjusted, thereby improving the transmission balance between the planetary gear set and the gear ring.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions: An installation method for a herringbone tooth gear ring, the herringbone tooth gear ring includes an upper gear ring and a lower gear ring. Both the upper gear ring and the lower gear ring have internal teeth and external teeth. The internal teeth of the upper gear ring and the internal teeth of the lower gear ring can be spliced into a complete herringbone tooth. The upper gear ring and the lower gear ring are sleeved outside a plurality of planetary gears of the planetary gear set and are engaged with the planetary gears. The external teeth of the plurality of planetary gears of the planetary gear set are all herringbone teeth. A fixing sleeve is sleeved outside the upper gear ring and the lower gear ring. Both the upper gear ring and the lower gear ring are in spline fit with the fixing sleeve and are axially fixed; the herringbone tooth gear ring adopts the following steps:

[0007] Step 1) After sleeving and fixing the lower gear ring with the internal teeth processed and the lower gear ring with the internal teeth processed on the calibration tire of the tooth alignment tooling, the external teeth of the upper gear ring and the external teeth of the lower gear ring are processed simultaneously. After the external teeth are processed, corresponding positioning marks are respectively marked on the upper gear ring and the lower gear ring with the external teeth processed; wherein, herringbone teeth are provided on the outer circumferential surface of the calibration tire. The upper gear ring meshes with the tooth profile of the upper half of the calibration tire, and the lower gear ring meshes with the tooth profile of the lower half of the calibration tire;

[0008] Step 2) Horizontally lift the lower gear ring and sleeve it outside the tooling table, and move the planetary gear set to the tooling table; wherein, the outer diameter of the tooling table is not greater than the outer diameter of the planet carrier in the planetary gear set;

[0009] Step 3) Horizontally lift the lower gear ring using a sling, so that the lower gear ring is sleeved on the planetary gear set from bottom to top. The lower half of the tooth profiles of the lower gear ring mesh with multiple planetary gears of the planetary gear set. After the hoisting is completed, support the lower gear ring with a support tooling, and adjust the height of the lower gear ring through the support tooling to complete the rough positioning of the lower gear ring; Horizontally lift the upper gear ring using a sling, and rotate the upper gear ring according to the positioning mark of the lower gear ring to adjust the position where the positioning mark of the upper gear ring is located. After the upper gear ring is sleeved on the planetary gear set from top to bottom, the upper half of the tooth profiles of the upper gear ring mesh with multiple planetary gears in the planetary gear shaft to complete the rough positioning of the upper gear ring and the lower gear ring;

[0010] Step 4) Install two jacking toolings on the side of the planet carrier of the planetary gear set. The two jacking toolings are arranged oppositely. The mounting seat of the jacking tooling is fixed on the side of the planet carrier. The screw rod threadedly connected to the mounting seat abuts against the bottom of the lower gear ring. Rotate the two screw rods of the two jacking toolings respectively to finely adjust the relative positions of the upper gear ring and the lower gear ring, so that the positioning marks located on the upper gear ring and the lower gear ring correspond to each other, thereby completing the fine adjustment of the relative positions between the upper gear ring and the lower gear ring;

[0011] Step 5) Horizontally lift the fixing ring and sleeve it outside the upper gear ring and the lower gear ring from top to bottom, so that the outer teeth of the upper gear ring and the outer teeth of the lower gear ring are both meshed with the inner teeth of the fixing sleeve to realize the circumferential positioning of the upper gear ring, the lower gear ring and the fixing sleeve. After installing the snap ring to axially position the upper gear ring, the lower gear ring and the fixing sleeve, then remove the support tooling.

[0012] Preferably, in the step 1), after the upper gear ring and the lower gear ring are fixed on the tooth alignment tooling, the distance between the top of the upper gear ring and the bottom of the lower gear ring is greater than the height of the calibration tire. The lower pressing plate of the tooth alignment tooling is fixedly connected to the bottom of the calibration tire and the bottom of the lower gear ring respectively through multiple bolts, and the upper pressing plate is fixedly connected to the top of the calibration tire and the top of the upper gear ring respectively through multiple bolts; wherein both the lower pressing plate and the upper pressing plate are circular, the outer diameter of the lower pressing plate is smaller than the root circle diameter of the lower gear ring, and the outer diameter of the upper pressing plate is smaller than the root circle diameter of the upper gear ring.

[0013] Preferably, in the step 1), after the outer teeth of the upper gear ring and the lower gear ring are processed, the circular runout error between the upper gear ring and the lower gear ring does not exceed 0.03.

[0014] Preferably, in the step 3), the support tooling includes a jack and a wooden cushion block. The jack is connected to the bottom of the lower gear ring through the wooden cushion block, and the rough positioning of the lower gear ring is completed by adjusting the extension length of the jack.

[0015] Preferably, the snap ring includes an upper snap ring and a lower snap ring. Two annular positioning grooves are formed in the inner side of the fixed sleeve in the up-and-down direction, and both positioning grooves are arranged on the internal teeth of the fixed sleeve. In step 4), before the fixed sleeve is lifted, the upper snap ring is first installed in the upper positioning groove; after the internal teeth of the fixed sleeve are engaged with the external teeth of the herringbone gear ring, the lower snap ring is installed in the lower positioning groove, so that the external teeth of the herringbone gear ring are located between the upper snap ring and the lower snap ring.

[0016] Preferably, in step 5) above, when installing the jacking tooling, the mounting seat is fixed to the side of the planet carrier by two bolts. The two bolts are arranged on both sides of the screw rod. Rotate the two bolts respectively to adjust the length of the bolts connected to the planet carrier, thereby adjusting the inclination angle of the mounting seat, and then finely adjusting the position where the screw rod is connected to the lower gear ring, and finely adjusting the relative positions of the screw rods on the two jacking toolings.

[0017] Preferably, in step 5), the screw rod of the jacking tooling abuts against the bottom of the lower gear ring through a gasket.

[0018] Preferably, in step 5), after the upper gear ring is installed, by rotating the screw rods of the two jacking toolings, the circular runout error between the upper gear ring and the lower gear ring does not exceed 0.03.

[0019] The beneficial effects of the technical solution of the present invention are as follows: During the installation of the herringbone gear ring, through the support of the support tooling, the weight of the gear ring and the fixed sleeve during the installation process is prevented from concentrating on the meshing teeth of the planet gear and the herringbone gear ring, avoiding the collapse of the tooth profile; by adjusting the jacking tooling and the positioning marks, the relative positions between the upper gear ring and the lower gear ring can be quickly adjusted, so that the planet gear, the upper gear ring and the lower gear ring are in the best meshing state, ensuring the stability and safety of the planet gear assembly and the gear ring during subsequent operation, and improving the assembly efficiency and success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic installation structure diagram of the planet gear set, the herringbone gear ring, the fixed sleeve and the jacking tooling;

[0021] Figure 2 is Figure 1 The enlarged view at A in

[0022] Figure 3 It is a schematic connection structure diagram of the herringbone gear ring and the planet gear set;

[0023] Figure 4 It is a schematic structure diagram of the jacking tooling.

[0024] Reference numerals: 8, planet carrier; 9, lower ring gear; 10, upper ring gear; 11, fixing sleeve; 110, upper circlip; 111, lower circlip; 20, sun gear; 21, planet gear shaft; 22, planet gear; 25, jacking tooling; 251, mounting seat; 252, screw rod. Detailed implementation manners

[0025] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more, unless otherwise clearly defined.

[0028] In the present invention, unless otherwise clearly specified and defined, the terms "mount", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0030] Embodiment

[0031] An installation method of a herringbone gear ring, as Figure 1-4 shown, the herringbone gear ring includes an upper gear ring 10 and a lower gear ring 9. Both the upper gear ring 10 and the lower gear ring 9 have internal teeth and external teeth. The internal teeth of the upper gear ring 10 and the internal teeth of the lower gear ring 9 can be assembled into a complete herringbone tooth. The upper gear ring 10 and the lower gear ring 9 are sleeved outside a plurality of planet gears 22 of the planet gear set and are meshed with the planet gears 22. The external teeth of the plurality of planet gears 22 of the planet gear set are all herringbone teeth. A fixing sleeve 11 is sleeved outside the upper gear ring 10 and the lower gear ring 9. Both the upper gear ring 10 and the lower gear ring 9 are in spline fit with the fixing sleeve 11 and are axially fixed. The herringbone gear ring adopts the following steps:

[0032] Step 1) After sleeving and fixing the lower gear ring 9 with processed internal teeth and the lower gear ring 10 with processed internal teeth on the calibration tire of the tooth alignment tooling, simultaneously process the external teeth of the upper gear ring 10 and the external teeth of the lower gear ring 9. After the external teeth processing is completed, respectively mark corresponding positioning marks on the upper gear ring 10 and the lower gear ring 9 with processed external teeth. Among them, herringbone teeth are provided on the outer circumferential surface of the calibration tire. The upper gear ring 10 is meshed with the tooth profile of the upper half part of the calibration tire, and the lower gear ring 9 is meshed with the tooth profile of the lower half part of the calibration tire.

[0033] Step 2) Horizontally lift the lower gear ring 9 and sleeve it outside the tooling table, and move the planet gear set to the tooling table. Among them, the outer diameter of the tooling table is not greater than the outer diameter of the planet carrier 8 in the planet gear set.

[0034] Step 3) Use a lifting tool to horizontally lift the lower gear ring 9, so that the lower gear ring 9 is sleeved on the planet gear set from bottom to top. The lower gear ring 9 is meshed with the tooth profile of the lower half part of the plurality of planet gears 22 of the planet gear set. After the hoisting is completed, support the lower gear ring 9 with a support tooling, and adjust the height of the lower gear ring 9 through the support tooling to complete the rough positioning of the lower gear ring 9. Horizontally lift the upper gear ring 10 with a lifting tool, and rotate the upper gear ring according to the positioning mark of the lower gear ring 9 to adjust the position where the positioning mark of the upper gear ring 10 is located. After the upper gear ring 10 is sleeved on the planet gear set from top to bottom, the upper gear ring 10 is meshed with the tooth profile of the upper half part of the plurality of planet gears 22 in the planet gear shaft to complete the rough positioning of the upper gear ring 10 and the lower gear ring 9.

[0035] Step 4) Install two jacking tools 25 on the side surface of the planet carrier 8 of the planet gear set. The two jacking tools 25 are arranged oppositely. The mounting seat 251 of the jacking tool 25 is fixed on the side surface of the planet carrier 8. The screw rod 252 threadedly connected to the mounting seat 251 abuts against the bottom of the lower gear ring 9. Rotate the two screw rods 252 of the two jacking tools 25 respectively to finely adjust the relative positions of the upper gear ring 10 and the lower gear ring 9, so that the positioning marks located on the upper gear ring 10 and the lower gear ring 9 respectively correspond to each other, thereby completing the fine adjustment of the relative positions between the upper gear ring 10 and the lower gear ring 9;

[0036] Step 5) Horizontally lift the fixing ring 11 and sleuth it from top to bottom outside the upper gear ring 10 and the lower gear ring 9, so that the external teeth of the upper gear ring 10 and the external teeth of the lower gear ring 9 are both meshed with the internal teeth of the fixing sleeve 11 to realize the circumferential positioning of the upper gear ring 10, the lower gear ring 9 and the fixing sleeve 11. After installing the snap ring to axially position the upper gear ring 10, the lower gear ring 9 and the fixing sleeve 11, then remove the support tooling.

[0037] With such a setting, during the installation process of the herringbone gear ring, through the support of the support tooling, it is avoided that during the installation process, the weights of the gear ring and the fixing sleeve are concentrated on the meshing teeth of the planet gear and the herringbone gear ring, and the tooth profile breakdown is avoided; by adjusting the jacking tooling and the positioning marks, the relative positions between the upper gear ring and the lower gear ring can be quickly adjusted, so that the planet gear, the upper gear ring and the lower gear ring are guaranteed to be in the best meshing state, ensuring the stability and safety of the planet gear assembly and the gear ring during subsequent operation, and improving the assembly efficiency and success rate.

[0038] In this embodiment, the mounting seat 251 of the jacking tool 25 is fixed on the side surface of the planet carrier 8 by two bolts. The two bolts are respectively arranged on both sides of the screw rod 252. When installing the jacking tool 25, rotate the two bolts respectively to adjust the lengths of the bolts connected to the planet carrier 8, thereby adjusting the inclination angle of the mounting seat 251, and further finely adjusting the position where the screw rod 252 abuts against the lower gear ring 9, and finely adjusting the relative positions of the screw rods 252 on the two jacking tools 25. With such a setting, it is convenient to adjust the accuracy of the relative positions between the two screw rods, making the effect of the jacking tooling more obvious and facilitating the adjustment of the relative positions of the upper gear ring and the lower gear ring. Further, the screw rod 252 of the jacking tool 25 abuts against the bottom of the lower gear ring 9 through a gasket. With such a setting, the force-bearing area of the lower gear ring is increased, preventing damage to the lower gear ring 9. Further, the support tooling includes a jack and a wooden cushion block. The jack jacks up the lower gear ring 10 through the wooden cushion block. With such a setting, since the fixing sleeve 11 and the upper gear ring 10 still need to be hoisted later, at this time, the lower gear ring 9 needs to be in a stable and safe state. The jack can provide sufficient supporting force for the lower gear ring, and the wooden cushion block can prevent damage to the lower gear ring 9.

[0039] In this embodiment, in step 1), after the upper gear ring 10 and the lower gear ring 9 are fixed on the tooth alignment fixture, the distance between the top of the upper gear ring 10 and the bottom of the lower gear ring 9 is greater than the height of the calibration tire. The lower pressing plate of the tooth alignment fixture is fixedly connected to the bottom of the calibration tire and the bottom of the lower gear ring 9 respectively through a plurality of bolts, and the upper pressing plate is fixedly connected to the top of the calibration tire and the top of the upper gear ring 10 respectively through a plurality of bolts; wherein both the lower pressing plate and the upper pressing plate are circular, the outer diameter of the lower pressing plate is smaller than the root circle diameter of the lower gear ring 9, the outer diameter of the upper pressing plate is smaller than the root circle diameter of the upper gear ring 10. After the external teeth of the upper gear ring 10 and the lower gear ring 9 are machined, the circular runout error between the upper gear ring 10 and the lower gear ring 9 does not exceed 0.03. With such a setting, the external teeth of the upper gear ring and the lower gear ring have high consistency through the above method, and after being paired by positioning marks, the tooth profiles of the external teeth of the upper gear ring are consistent with the tooth profiles of the external teeth of the lower gear ring, reducing errors, improving the installation efficiency and installation accuracy, and making the transmission process more stable. Further, after the external teeth of the upper gear ring 10 and the lower gear ring 9 are machined and after the upper gear ring 10 and the lower gear ring 9 are assembled, the circular runout error between the upper gear ring 10 and the lower gear ring 9 does not exceed 0.03.

[0040] In this embodiment, two annular positioning grooves are formed inside the fixing sleeve 11, and the two positioning grooves are arranged in the vertical direction. The two positioning grooves are formed on the internal tooth section of the fixing sleeve 11. In step 4) above, the axial fixing method of the upper gear ring 10, the lower gear ring 9 and the fixing sleeve 11 is as follows: before hoisting the fixing sleeve 11, install the upper snap ring 110 in the upper positioning groove, and after the fixing sleeve 11 is hoisted, install the lower snap ring 111 in the lower positioning groove. The external teeth of the upper gear ring 10 are located between the upper snap ring 110 and the lower snap ring 111. With such a setting, the axial positions of the upper and lower gear rings are adjusted to make the herringbone teeth meshed radially and centered, and the external teeth are aligned, so that the fixing sleeve, the upper gear ring and the lower gear ring are connected into a whole.

[0041] In this embodiment, the planetary gear set further includes a sun gear 20 and a plurality of planetary gear shafts 21. The external teeth of the sun gear 20 are herringbone teeth. The plurality of planetary gear shafts 21 are arranged around the sun gear 20. The plurality of planetary gears 22 are all meshed with the sun gear 20. The plurality of planetary gear shafts 21 are fixed on the planet carrier 8. The plurality of planetary gears 22 are mounted on the plurality of planetary gear shafts 21 in a manner that enables rotation and vertical sliding. A sliding friction is formed between the planetary gear shaft 21 and the planetary gear 20 through a babbitt alloy coating. Since both the upper ring gear 10 and the lower ring gear 9 are meshed with the fixed sleeve 11, and the axial positions of the upper ring gear 10, the lower ring gear 9 and the fixed sleeve 11 are fixed by the upper snap ring 110 and the lower snap ring 111, and the planetary gear 22 has herringbone teeth, and the upper ring gear 10 and the lower ring gear 9 are respectively meshed with the upper tooth part and the lower tooth part of the planetary gear 22, the axial positions of the planetary gear 22, the upper ring gear 10, the lower ring gear 9 and the fixed sleeve 11 are fixed. Furthermore, when the jacking tooling 25 jacks up the lower ring gear 9 to adjust the height of the lower ring gear 9, the lower ring gear 9 can drive the fixed sleeve 11, the upper ring gear 10 and the planetary gear 22 to move up and down to adjust the axial position.

[0042] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0043] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and purposes of the present invention.

Claims

1. A method for installing a herringbone gear ring. The herringbone gear ring includes an upper gear ring (10) and a lower gear ring (9). Both the upper gear ring (10) and the lower gear ring (9) have internal teeth and external teeth. The internal teeth of the upper gear ring (10) and the internal teeth of the lower gear ring (9) can be joined together to form a complete herringbone tooth. The upper gear ring (10) and the lower gear ring (9) are sleeved outside multiple planet gears (22) of a planetary gear set and mesh with the planet gears (22). The external teeth of the multiple planet gears (22) of the planetary gear set are all herringbone teeth. It is characterized in that: A fixing sleeve (11) is sleeved outside the upper gear ring (10) and the lower gear ring (9). Both the upper gear ring (10) and the lower gear ring (9) are in spline fit with the fixing sleeve (11) and axially fixed. The following steps are adopted for the herringbone gear ring: Step 1) After sleeving and fixing the lower gear ring (9) with processed internal teeth and the upper gear ring (10) with processed internal teeth on the calibration tire of the tooth alignment tooling, simultaneously process the external teeth of the upper gear ring (10) and the external teeth of the lower gear ring (9). After the external teeth processing is completed, respectively mark corresponding positioning marks on the upper gear ring (10) and the lower gear ring (9) with processed external teeth. Among them, herringbone teeth are provided on the outer cylindrical surface of the calibration tire. The upper gear ring (10) meshes with the tooth profile of the upper half part of the calibration tire, and the lower gear ring (9) meshes with the tooth profile of the lower half part of the calibration tire. Step 2) Horizontally lift the lower gear ring (9) and sleeve it outside the tooling table, and move the planetary gear set to the tooling table. Among them, the outer diameter of the tooling table is not greater than the outer diameter of the planet carrier (8) in the planetary gear set. Step 3) Use a lifting tool to horizontally lift the lower gear ring (9) so that the lower gear ring (9) is sleeved on the planetary gear set from bottom to top. The lower gear ring (9) meshes with the tooth profile of the lower half part of the multiple planet gears (22) of the planetary gear set. After the hoisting is completed, support the lower gear ring (9) with a support tooling, and adjust the height of the lower gear ring (9) through the support tooling to complete the rough positioning of the lower gear ring (9). Horizontally lift the upper gear ring (10) with a lifting tool, and rotate the upper gear ring according to the positioning mark of the lower gear ring (9) to adjust the position where the positioning mark of the upper gear ring (10) is located. After the upper gear ring (10) is sleeved on the planetary gear set from top to bottom, the upper gear ring (10) meshes with the tooth profile of the upper half part of the multiple planet gears (22) in the planetary gear shaft to complete the rough positioning of the upper gear ring (10) and the lower gear ring (9). Step 4) Install two jacking toolings (25) on the side surface of the planet carrier (8) of the planetary gear set. The two jacking toolings (25) are arranged oppositely. The mounting seat (251) of the jacking tooling (25) is fixed on the side surface of the planet carrier (8). The screw (252) threadedly connected to the mounting seat (251) abuts against the bottom of the lower gear ring (9). Rotate the two screws (252) of the two jacking toolings (25) respectively to finely adjust the relative positions of the upper gear ring (10) and the lower gear ring (9) so that the positioning marks located on the upper gear ring (10) and the lower gear ring (9) correspond to each other, thereby completing the fine adjustment of the relative positions between the upper gear ring (10) and the lower gear ring (9). Step 5) Horizontally lift the fixed sleeve (11) and sleeved it from top to bottom outside the upper gear ring (10) and the lower gear ring (9), so that the external teeth of the upper gear ring (10) and the external teeth of the lower gear ring (9) are engaged with the internal teeth of the fixed sleeve (11) respectively, to achieve the circumferential positioning of the upper gear ring (10), the lower gear ring (9) and the fixed sleeve (11). After installing the snap ring to axially position the upper gear ring (10), the lower gear ring (9) and the fixed sleeve (11), then remove the support tooling.

2. A method for installing a herringbone gear ring according to claim 1, characterized in that: In the step 1), after the upper gear ring (10) and the lower gear ring (9) are fixed on the tooth alignment tooling, the distance between the top of the upper gear ring (10) and the bottom of the lower gear ring (9) is greater than the height of the calibration tire. The lower pressing plate of the tooth alignment tooling is fixedly connected to the bottom of the calibration tire and the bottom of the lower gear ring (9) respectively through a plurality of bolts, and the upper pressing plate is fixedly connected to the top of the calibration tire and the top of the upper gear ring (10) respectively through a plurality of bolts; wherein both the lower pressing plate and the upper pressing plate are circular, the outer diameter of the lower pressing plate is smaller than the root circle diameter of the lower gear ring (9), and the outer diameter of the upper pressing plate is smaller than the root circle diameter of the upper gear ring (10).

3. A method for installing a herringbone gear ring according to claim 1, characterized in that: In the step 1), after the external teeth of the upper gear ring (10) and the lower gear ring (9) are processed, the circular runout error between the upper gear ring (10) and the lower gear ring (9) does not exceed 0.

03.

4. A method for installing a herringbone gear ring according to claim 1, characterized in that: In the step 3), the support tooling includes a jack and a wooden cushion block. The jack is connected to the bottom of the lower gear ring (9) through the wooden cushion block, and the rough positioning of the lower gear ring (9) is completed by adjusting the extension length of the jack.

5. A method for installing a herringbone gear ring according to claim 1, characterized in that: The snap ring includes an upper snap ring (110) and a lower snap ring (111). Two annular positioning grooves are arranged vertically inside the fixed sleeve (11), and both positioning grooves are arranged on the internal teeth of the fixed sleeve (11); in the step 4), before lifting the fixed sleeve (11), first install the upper snap ring (110) in the upper positioning groove; after the internal teeth of the fixed sleeve (11) are engaged with the external teeth of the herringbone gear ring, install the lower snap ring (111) in the lower positioning groove, so that the external teeth of the herringbone gear ring are located between the upper snap ring (110) and the lower snap ring (111).

6. A method for installing a herringbone gear ring according to claim 1, characterized in that: In the above step 5), when installing the jacking tooling (25), the mounting seat (251) is fixed on the side of the planet carrier (8) through two bolts, and the two bolts are arranged on both sides of the screw rod (252). Rotate the two bolts respectively to adjust the length of the bolts connected to the planet carrier (8), thereby adjusting the inclination angle of the mounting seat (251), and then finely adjusting the position where the screw rod (252) is connected to the lower gear ring (9), and finely adjusting the relative position of the screw rods (252) on the two jacking toolings (25).

7. A method for installing a herringbone gear ring according to claim 1, characterized in that: in the step 5), the screw rod (252) of the jacking tooling (25) abuts against the bottom of the lower gear ring (9) through a gasket.

8. A method for installing a herringbone gear ring according to claim 1, characterized in that: in the step 5), after the upper gear ring (10) is installed, the relative positions of the upper gear ring (10) and the lower gear ring (9) are adjusted by rotating the screw rods (252) of the two jacking toolings (25) so that the circular runout error between the upper gear ring (10) and the lower gear ring (9) does not exceed 0.03.

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